Category Archives: Other

How to define particle size?

Particle size is a very important property in the research field of cementitious materials, e.g. modeling, reaction kinetics. Particles are 3-dimensional objects, and unless they are perfect spheres, e.g. emulsions or bubbles, they cannot be fully described by a single dimension such as a radius or diameter. In order to simplify the measurement process, it […]

What is Geopolymer cement?

I have been confused by the term “Geopolymer cement (concrete)” for long time. Some researchers told me Geopolymer cement is essentially alkali activated cement/material (AAMs), such as alkali activated slag and fly ash. Since alkali activated slag is indeed a kind of geopolymer cement, it looks logical to consider Geopolymer cement as alkali activated cement. […]

Buoyancy Effect of TGA Experiment

What is Buoyancy Effect of TGA experiment? TGA (thermogravimetric analysis) is an important method to analyze the hydration products of cementitious materials. When a TGA test for cementitious materials sample is performed, the initial TGA curve may appears as such: As can be seen from the curve, the mass exceeded the original mass, which is […]